Conductive Hydrocarbon Fluid for Electrostatic Dissipation
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Solution Overview
Problem
Traditional hydrocarbon-based processing fluids used in forming electronic components have low conductivity, leading to electrostatic build-up and corrosion, resulting in damaged or poorly performing components and increased production costs.
Innovation Solution
A hydrocarbon-based processing fluid with a specific gravity of 0.7 to 0.9 and conductivity of at least 10 nS/m, comprising an aliphatic hydrocarbon component and a Lewis active component, along with a glycol ether and ionic polymer, is used to prevent electrostatic discharge and corrosion during processes like lapping and polishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydrocarbon-based processing fluid is used to prevent corrosion and oxidation, then component surface protection is improved, but electrostatic build-up occurs leading to component damage
Solution Approach 1:
The patent modifies the electrical conductivity parameter of hydrocarbon processing fluids by adding conductive additives (such as ionogenic compounds, metallic particles, or ceramic particles) to achieve a conductivity range of 10^-12 to 10^-6 siemens per meter. This parameter change allows the fluid to maintain its corrosion-resistant hydrocarbon properties while dissipating electrostatic charges effectively.
Solution Approach 2:
The invention creates a composite processing fluid by combining hydrocarbon base fluids with conductive additives. The composite structure integrates the corrosion-protection benefits of hydrocarbons with the electrostatic-dissipation capabilities of conductive materials, resolving the contradiction between protection and electrostatic build-up.
2Productivity
If water-based processing fluid is used for heat transfer and swarf removal, then processing efficiency is improved, but corrosion and oxidation of component surfaces occur
Solution Approach 1:
The patent changes the chemical composition parameter of processing fluids from water-based to hydrocarbon-based while simultaneously adjusting the electrical conductivity parameter through additives. This dual parameter modification maintains the fluid's ability to transfer heat and remove swarf while eliminating the corrosive and oxidizing properties of water.
Solution Approach 2:
The invention uses hydrocarbon-based fluids that can be easily replaced or regenerated compared to water-based systems. The conductive additives in the hydrocarbon fluid provide sufficient electrostatic dissipation without requiring the complex corrosion-inhibition systems needed in water-based fluids, simplifying the overall fluid system.
3Object-affected harmful factors
If typical hydrocarbon formulations are used to prevent corrosion, then oxidation protection is improved, but low conductivity leads to electrostatic discharge damage
Solution Approach 1:
The patent specifically targets the conductivity parameter of hydrocarbon formulations, adjusting it to fall within the range of 10^-12 to 10^-6 siemens per meter through the addition of conductive compounds. This parameter adjustment maintains the oxidation-protection benefits while preventing electrostatic discharge that would compromise component reliability.
Solution Approach 2:
The conductive additives act as intermediaries between the hydrocarbon fluid and electrostatic charges. These additives (ionogenic compounds, metallic particles, or ceramic particles) mediate the electrostatic dissipation process without interfering with the hydrocarbon's oxidation-protection function, thereby preserving component performance quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The fluid effectively prevents electrostatic charge build-up and reduces corrosion, resulting in improved surface and electrical performance of components, while maintaining desirable physical properties for efficient processing.
Implementation Method 1
a hydrocarbon-based processing fluid with a specific gravity of 0.7 to 0.9 and conductivity of at least 10 nS/m, comprising an aliphatic hydrocarbon component and a Lewis active component
Data Source
AI summary
The disclosure is directed to a processing fluid including at least 50 wt % of an aliphatic hydrocarbon having an average chain length of 8 to 16 carbons, 0.005 wt % to 10.0 wt % of Lewis active components, and not greater than 1.0 wt % water. The Lewis active components includes a Lewis acid and a Lewis base. The processing fluid has a conductivity of at least 10 nS/m and a Cannon viscosity of about 0.5 cp to about 5 cp at 25° C.